Nonrefillable can and grease gun



J. P. GENTRY, JR

NONREFILLABLE CAN AND GREASE GUN March 5, 1935.

Filed June 21, 1955 2 Sheets-Sheet 1 BM MM 62 GM March 5, 1935. P N JR NONREFILLABLE CAN AND GREASE GUN Filed June 21, 1953 2 Sheets-Sheet 2 GUM/11M J S Patented Mar. 5, 1935 1,993,160

UNITED 'STATE-SPATENT OFFICE: i 1mm. GREASE GUN I l I.

'James P. Gentry, Jr., Cleveland, Ohio, assignor to Halsey W. Taylor, Warren, Ohio Application June 21, 1933, Serial No. 676,972 1 Claims. (o1. 221-413) My invention relates to grease cans or congrease gun 14 by means of a set screw 15, which tainers. for supplying grease to a grease gun. screw bears against the free end of a split clamp- The general object of the invention is to proing ring '16 seated within a groove 17. However, vide an exchangeable non-refillable grease can it will beunderstood that any desirable means 5 which can be readily attached to the gr'easegun may be employed to connect the can to the gun. 5 and from which can the grease is automatically A grease conducting tube 18 extends through the supplied to the grease gun and discharged thereregistering openings 8 and 9 in the follower piston from when the gun is actuated. 5 and into the body of grease 2. Slidably mounted Other objects and advantages of the invention on this tube 18 is a sealing ring 19 which seats will beapparent as the specification is considered against the upstanding flange 10, a coil spring 20 10 in connection with the accompanying drawings, being seated at opposite ends against the cylinder in which: g head 12, and' the ring holds the latter to its seat, Figure 1 is a longitudinal vertical sectional view and causes the follower piston to keep the grease through a grease gun having-an interchangeable compressed into a compact mass and also prel5 grease container attached thereto, the air pres-' vents air being sucked into the grease below the 1 sure operating mechanism being shown in action; said follower piston and finally into the grease Figure 2 is a cross sectional view through the gun. That end of the tube 18 which extends into grease gun shown in Figure 1, the section being the body of grease in can 1 is normally closed taken on line 2-2 of Figure 1; by a ball valve 21 pressed to its seat by a coil 20 Figure 3 is a. plan view of the interchangeable spring 22. The piston 23 for cylinder 13 is fixedly 20 35 the suction piston arrangement of, the grease gun. piston 5 has the tendency to force grease through fully sealed grease container; mounted upon a hollow piston and guiding rod 24 Figure 4 is a longitudinal sectional view of the which extends at opposite endsthrough the cylgrease container, the section being taken on line inder heads 12 and 12' which alsoserve as stufiing 4-4 of Figure 3; boxes. The rear end of hollow rod 24 on which 25 Figure 5 is an enlarged fragmentary sectional a small piston 25 is fixedly mounted, extends 25 view through the scored toplid of the container within the bore 26 of tube 18, and in spaced relashowing the disk portion of said lid partly pried tion to the wall of said bore, and is normally p I closed by a spring pressed ball valve 2'7. Bore 26 Figure 6 is anenlarged sectional'view on line communicates at its inner end through a passage 6-6 of Figure '7; 4 Y Y I 43 with the open air to permit free reciproqatory 30 Figure 'l is an enlarged sectional view through movements of piston 25 in said bore during operathe air controlling mechanism of the grease gun; tion of the gun. and v The operation oiv the grease gun is as follows: Figure 8 is an enlarged sectional view through The pressure of spring 20 exerted against Referring more particularly to the drawings ball check 'valve'21 into the enlarged lowerend 1 denotes a metal can adapted to contain grease 2 of bore 26 of tube 18. However this flow of grease or other lubricant for greasing automobiles and is primarily induced by the suction action of the like. The can is closed at top and bottom piston 25 when the latter is moving in a forward by a lid and bottom member 3 and 4 respecdirection under the influence of air directed tively. Beneath the lid member 3 and resting on against the rear side of piston 23. Movement top of the grease 2 is a. follower piston 5 conof the trigger 28 of grease gun 14 to the right and sisting of a corrugated metal disk 6, superimto the position shown in Figure 1 causes a spring posed upon and glued to a disk shaped washer 7 pressed slide valve 29 to bring about communicaof felt or other suitable material. These piston tion between a passage 30and a chamber 40 and parts are provided with centrally disposed registo move valve 31 from its seat againstthe tentering openings 8 and '9 respectively, and the sionof coil spring 32. Air frorfi'a pressure tank metal disk6 is provided with an upstanding flange not shown, will now pass through said chamber 10 surrounding the opening 8. The cover mem- 40 and passages 30 and 33 into cylinder 13 at the her 3 is heavily scored at 9' to permit'ready rerear side of piston 23, causing the latter to move 0 moval of the disk portion 11 from the cover, by forwardly and a charge of. grease to be taken into 'means of a pointed instrument, not shown. the end of the tube. At the same time the air After disk 11 has been pried loose and removed pressure existing in the fore part of cylinder 13 the can is clamped to a screw threaded head is exhausted through passage 34 which passage II 12 closing the rear end of the cylinder 13 of isbrought into communication with the exhaust 5 passage 41 by the trigger movement just de-i scribed. During the forward movements-of pisopen communication with chamber 4 the same time returning piston' 25 to the rear end of bore 26 of tube 18. Air from the rear end of cylinder 13 is at this-time exhausted through passages 30 and; exhaust passage 41. The charge of use grease previously taken into the .rear end of tube; 18 through check valve 21 is thus forced through ball valve 27 into and through thehollow rod 24 and thence out through check valve '35 atjthe forward end of said rod into cylinder 36 where it" is held by .check valve 37-. On the next'forward mo'v'ement of piston .23 and its hollow rod 24', caused by-manual actuation of trigger 28, the grease in cylinder 36,is discharged through valve 37 and into and from outlet nozzle 38 ,-the'for ward end of 'rod 24acting as aram in displacing the grease in cylinder 3 6 during this=movement.

Inwardly extending ridges of "other obstructions 39, formed in theinterior of canl, cooperate with the circumferential edge'of'the flanged portion of metal disk 6 in preventing return movement .of piston- 5 toward the open end of the can and consequently it will. be praqtically impossible for v a dishonest attendant to refill the can or substitute the grease in the can for aninferior grade of grease. Furthermore the lid 3.which alwa ys remains inplace'and' ofiers a'serious obstacle to a person tampering-with or atter'npting destruction and removal of the piston for thepurpose of refilling and substitution of another follower piston. The grease manufacturer as well ajs theservicestation owner and the .publicare thus proatected against fraudulent substitution. The cans grease man- 1 may if desired-bear the label of the ufacturer or the retailer desired. I

. Having thus described-my invention.

What I claim is:

11. The combination of 'agrease gunembody ing means for compressing and'dlz harging grease and meansjfor actuatingsaid' first means, with a greasecontainer interchangeably secured to .'-and carried by said grease gun and means extended from said gun into said container adapted'to suckgrease from said container and force said grease Ldirectly into said compressing and; discharging means,- the means extended into said container being coupled with and'operated by s'aidactuat- -1ingmeans.v. n

2. Thecombination of a grease 'gun. ernbody-" ing-reciprocatory means for compressinganddis- 0, having a charging grease and reciprocatory means for actuating said first means, with a grease container said actuating means and adapted to suck grease from said container and force said grease die rectly into said compressing and discharging means.

ing a ram for compressing and discharging grease, a reciprocatory piston coupled with said ram for actuating same, and means for reciprocating said piston} with a grease container interchangeably secured to and carried by said grease gun in axial .10 3. Thecombination of a grease gun embodyalignment with said piston and a suction pump 1 extended from said gun into said container and coupled with said piston for sucking grease from said container and forcing same into said ram.

4. The combination of a greasegun embody-- ing a rain for compressing and discharging grease, a reciprocatory piston coupled with said ram, and

means 'for actuating said piston,-with a grease container interchangeably secured to and-carried by said grease gun in axial alignment'with said "piston; a suction. pump extended from said gun into saidcojntainer coupled with said piston and ,communicating through a valve passage with said ram, shiftable means within said container adapted to pack said grease and yielding meansto efiect packing of' the 'tainer. by said shiftable means.-

grease within said con- 5. The combination describedin claim4 wherein the shiftable means consist ofa stiffened follower member tightly-engaged with the circumferential wallof said can.

'6.'Th e combination Io f a grease gun having'a ing througlrand coupled with said piston, means [for conducting air alternately to opposite sides .of said piston for actuating said rod-. a small cylinder and piston, a hollow piston rod extendsaid grease gun'inaxial alignmentwi'thsaid p'i stonrod forn' ing a cylinder for the piston at the "re'ai end of said rodande'xtending into said can.

and through said piston, said rodwhen reciprocated' by said pistoncausing' the piston-at the .ar :of.said rod to draw grease from said can 5 v intosaid grease gun.

{1. The combinationdescribed in claiinfi. wherem the. sides of the ean are slightly indented to render diflicult a' return movement of the follower -pi's'tor' towards the top of the can.

: Jams P. J3. 

